US Bridges

SR-70 over Myakka River

Fair

Manatee County, Florida · 0.5MI E of Wauchula RD · Structure no. 130016

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
294 ft
7 main spans
Daily traffic
6,400
2022 count
Owner
State
State Highway Agency

About this bridge

SR-70 over Myakka River is a prestressed concrete stringer/multi-beam or girder carrying SR-70 over Myakka River in Manatee County, Florida. It was built in 1965, so it is 60 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,400 vehicles a day, roughly 27% of them trucks, projected to reach 11,104 by 2044. The structure is 294 ft (89.6 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesSR-70
CrossesMyakka River
Location0.5MI E of Wauchula RD
RouteState Highway 70
CountyManatee County
StateFlorida
Coordinates27.34403, -82.15681
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.9 US tons
Inventory rating29.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length294 ft (89.6 m)
Longest span42 ft (12.8 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2022)
Projected traffic11,104 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$63,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-70 over Myakka River built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR-70 over Myakka River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does SR-70 over Myakka River carry?

About 6,400 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is SR-70 over Myakka River?

The structure is 294 ft (89.6 m) long with a longest span of 42 ft (12.8 m) and a deck 35 ft wide.

Who owns SR-70 over Myakka River?

It is owned by the State Highway Agency.